We have done alot of allergy elimination and have cut out all the stuff that was causing issues- skin rashes (just not ever on his cheeks). Now that his body rashes have cleared, his cheeks are red. I have only added in flax oil as a new thing and that is what helped clear his body rashes up. But before then, we used ground flax so I don't think that flax could be an issue. When the redness goes away, he is never "teething" like chewing on his fingers. But when his cheeks get red, he is also chewing on his fingers. That is why I wonder if it is teething related.
I just remembered that he has been eating alot more lately since he is jumping at our food we are eating. But it all the same food that we have been eating all along that he would be getting through the breastmilk, and I am pretty careful about what he eats.